This magnetron has the serial number 10134 and might be a type 'B' but it is unclear.

The CV41 was developed in 1941 and used in early production models of the GL3 radar. It was the last
unstrapped S-band magnetron to be developed in the UK and was replaced in 1942 with the echelon
strapped CV120.

Heater voltage

6.0V

Heater current

7.0A

Max anode dissipation

1000W

Wavelength *

10.70 ±0.2 cm

Typical operating conditions **

Peak anode voltage

25kV

Peak anode current

40A

Average output peak power

170kW

Magnetic field

860 oersteds

Approx air blast

100 cu ft/min

*: there are three frequency variants: A has a wavelength of
10.56, B is 10.70 and C is 10.84 cm, all ±0.07cm.
**: These operating conditions refer to a sensibly square pulse shape,
1µs duration, repetition rate 500 cycles per second max, and during operating and
testing air must be blown through a fitting surrounding the fins. In no
case shall the temperature of the anode exceed 140°C.